lindemuth



(No Model.) 2 Sheets-Sheet -H. H. LINDEMUTH.

STEAM BOILER. No. 283,497. Patented Aug. 21, 1883.

WITNESSES 2 Sheets-Sheet 2.'

(No Model.)

H. 4H. L INDEMUTH STEAM BOILER.

Patented Aug nl. ravens. nam-ummm.: wnmgnm um;

quite, to the wall A, so that a smoke-passage,

UNITED;A STATES PATENT OFFICE.'

HARRY H. LINDEMUTH, OFVIOUNT JGY, 1,)ENXSYLVANIA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 283,497, dated August21, 1883.

V' Applicatonlld June 13, 1583. (No model.)

.T1 aZZ whom it nung-concern.-

Be it known that I, HARRY H. LINDEMUTH, a citizen of the United States,residing at Mount Joy, in the county of Lancaster and State ofPennsylvania, have invented a new and useful Steam-Boiler, of which thefollowing is a specification, reference being had to the accompanyingdrawings.

This invention. relates to. steam-boilers of that class in which dues ortubes are arranged to conduct the heat through the water-chain-4 ber;and its object is to provide a boiler of this class which will possesssuperior advantages in point of simplicity, ii'iexpensiyeness, andgeneral. eiiiciency, whereby economy in fuel, heat, and space issecured.

In the drawings, Figure 1 is a vertical longitudinal sectional View ofmy improved steamboiler. Fig. 2 is a horizontal sectional view on theline x fr, Fig. 1. Fig. 3 isa horizontal sectional View on. the line yy, Fig. 1. Fig. 4t is a horizontal sectional view on the line z e, Fig.1.

Referring to the drawings, A designates the cylindrical outer wall orcasing of my Yi1uproved steam-boiler, which is vertically disposed, andis surmounted by a dome, B, in which is centrally vprovided the usualsmokeexit opening or flue, C. From the lower edge of the1 cylindricalout-er wall, A, extends 4an inwardlyprojecting bottom, l), as far as theinterior iire-chamber, E, the bottom of which latter being formed by thegrate F.

G is theY horizontal top of the fire-chamber E, this top being arrangedi ust under the dome B-so that a smokespace, H, is left between it andthe dome-and extending nearly, but not I, remains between the edge ofthis topv G and the said wall A. From they outer edge of the top Grdepends any approximately-upright cylindrical wall, J, which extendsdown nearly to the bottom D, so that a smoke-passage, K, is left betweenthe end of this wall and the said bottom, from which the smoke passesinto the space or chamber M, between the outer wall, A, and thisinnerwall, J. This inner wall, J, is preferably inclined downwardly andin Wardly, as shown, so that the smoke and products of combustion willbe, in a measure, longer retained in the larger portion of the O, beingthus formed between the top edge of the wall N and the top G. The wallNis connected with the wall J by annular top and bottom plates, l? Q,resliectively, which projecti'rom the ends of the wall N.

It will be observed that the water-chamber (designated by the letter R)is formed by the walls P and J and the top and bottom plates,

P and Q, this Watenchamber being annular in contour and directlyadjoining the recham ber E on its inner side, while the hot-air andsmoke space M is between it and the outer Wall,'A, so that it issubjected to heat on both sides and at its top and bot-tom. Through thischamber It is disposed an annular series of perpendicular lues, S, whichpass entirely through the said chamber B, and open at their top into thepassage O and at their bottoms into the passage K. The smoke andproducts ofcombustion thus have a continuous passage from thetire-chamber E up through the passage O into the dues S, down thesetiues and through the passage K into the chamber M from whence they passup through the passage I into the chamber H and out at the flue C. Bythis arrangement the water is exposed on all sides to the heatradiation, and the smoke is caused to pass longitudinally and in contactwith the wall ofthe water chamber three times before it iinallyescapes-to wit, iirst up against the inner wall of the water-chamber,then down through the latter by means of the dues S, and then up againagainst the outer wall of the waterchamber through the space M, asindicated by the arrows, Fig. 1 of the drawings. y Steam can thereforebe more quickly obtained, and the heat is entirely utilized.

A steam-pipe, T, having a safety-valve, U, may be arranged to projectfrom the top of the steam and water chamber R, through the casingwalls,as shown, to convey the steam to the cylinder of the engine, and asuitable watergage, V, may be arranged to project from the chamber Rthrough the outer wall, A. The

IOO

chamber R can be fed through a suitable pipe, W. The inner wall, N, ofthe fire-chamber is preferably shrunk into place in lieuof being bolted,when the heat of the iire will always serve to expand it and retain itin desired position. To effect this the plates l? and Q are I providedwith recesses a in their inner edges,

in which the top and bottom edges of the inner wall, N, are receivedwhen the latter is cold,`so that the heat of the furnace will expandthis unsecured wall and retain it in position` in the said recesses. Ifthe wall were bolted in position, the expansion of the metal causedbythe heat of the furnace would wrench the bolts. rIvhis wall N can beinserted in the sockets or recesses at a temperature lower than it willever be subjected to, so that it will never contract sufficiently,whenthe furnace should not be in use, to fall from its sockets. From the topG a feed funnel or reservoir, X, de-. pends centrally in thefire-chamber E, this funnel being provided with a cap or cover, Y, sothat there will be no possibility of the escape vof the smoke andproducts of combustion up through the fuel in the funnel without passingthrough the flues S and chamber M, as above set forth. A door or slide,Z, is provided in the dome B, through which coal can be fed into thefunnel, and a door, A2, is preferably formed in the top G, through whichan inspection of the interior can be had.

The grate F is arranged to slide vertically in the chamber, and for thispurpose it is provided with a standard, B2, to which is pivoted a lever,C2, for operating. By this adjustable grate the amount of fire, andconsequently the heating capacity, can be regulated, and for this gratemechanism separate application for patent will be made.

The operation and advantages of my invention will be readily understoodand appreciated.

I claim as my invention- The combination of the cylindrical outer wallor casing, A, the dome surmounting the wall and having the smoke-flue,the annular inwardly-proj ectin g bottom D, extending from the loweredge of the wall A, the horizontal top plate, G, of the nre-chamber,extending nearly to the wall A, and arranged under the dome, thecylindrical wall J, depending from the edge of the top G down nearly tothe bottom'I), the inner wall, N, extending from the inner edge of thebottom D up nearly to the top G, the annular top and bottom plates, l?and Q, extending from the ends of the wall N to the wall J, the annularseries of longitudinal flues opening through the plate P at their topinto the fire-chamber, and through the plate Q at their bottom into thespace between the walls J and A, and the fuel-feed opening in the top G,having a cap or cover, so that the fire-chamber will be closed to forcethe smoke and products of combustion throughv the flues, as and for thepurpose set forth. In testimony that I claim the foregoing as my own Ihave hereto affixed my signature in presence of two witnesses.

HARRY H. LINDEMUTH.

Titnesses -f PETER BRUNNER, DAvID H. ENGLE.

